I m proved m in ing- mac mine



y y of,-Fi g. 3. ,View of theratchet-Wheel and spring-pawl.l Fig. 3 is a side view.

UNITED STATES' PATENTv 'OFFICE.

DAVID MORRIS, OFJRARTLETT, AssIGNoR'To 'HIMSELR ANDAARON P.

REWEES, or rnNNsvILLE, OHIO.

IMPRovl-:D -MlNl'N'-MACHINE.

Specification forming part of Letters Patenthb, 92,875.1.,datcd July 20, ISGS..

To aZZ whon'l, it 17e/,ty conce/n.-

' Be it known that I, DAVID MoRRIs, of Bartlett, in the county of Washington and State of Ohio, haveinvented a new and Improved Mining-Machine; land-Ido hereby declare that the following is a full, clear, and exact description ofthe construction and operation of the same, reference being had to the accompanying drawings, making a part of. this specification, in whichf' 'Figure lis ahorizontal section through line Fig. 2is a detached sectional The objectof this invention is to produce a new and improved instrument for cuttiig out coal in the mines. which will operate more easily and conveniently andwith greater effeet vthan any heretofore in use.

To this end the machine ,consists4 in a frame .supporting a pivoted horizontal arm of considerable length, which carries at its forward end two horizontal circular saws, parallel to each other and upon the same shaft, rotated by an endless chain passing between them, the chain being provided with teeth which clearsthe coal from the saws and assists themin their work, and the whole being actuatedl by a 1ever and a peculiar arrangement of ratchet-gear wheels. l s

In the drawings, A isthe bed-plate, and A the top plate of the frame, the two being connected by upright standards P P. C is the arm, consisting of two plates, 0.0, connected together by bolts and supportingrollers r o for the endless chain, the armvbeing pivoted to plate A at a, at which point it.

is re-enforced on its upper and under side by a wide strong plate, D', attached to it and swinging on the pivot a with it. At one end the'arm C, is provided with ahandle, F, by which it can be rocked and moved on its pivot, so as to bring the saws to any position required. The saws S S are supported at the other end upon a shaft, s. Between the saws, and firmly attached to the shaft s, is one of the rollers 1', upon which the chain runs, sothat the latter thereby rotates both saws in the same direction and with the same speed.

E is the chain, constructed in the well-known manner of single and double links, as shown by Figs. 1 and 3, and provideu wan Sharp cutting-teeth e @,whiciipass between the saws,

moving iu the same direction with them and assisting them to cut out'thecoal, the main function of vthe teeth, however, being to relmove the coal sawed out' by the saws S S', and

prevent it from wedging in between them and impedingtheir operation. The chain, thus constructed and opera-ting, is actuated by a large roller, r2, between the two plates D D, firmlyy The several parts being thus constructed, it'

is evident that if the large vertical shaft a can Vbe rotated properly, the machine will become an effective instrument for the purpose indicated. To accomplish this, I fix a small bevelpinion, m, to the shaft near its lower end. I then construct a spindle, T, enlarging it at the middle and cutting a circular hole transversely through it at that point. This spindle I slip upon the shaft a, allowing it to rest upon the hub'of pinion m or upon a washerl between it and said hub. I place la collar or washer, "v, around the shaft above the spindle and resting upon the latter, and fasten it there by means of a pin or'oth'er suitable device.

' lI-Iaving thus constructed the spindle, I arrange upon it two equal bevel-gear wheels, N N', one on each side of the shaft a, and both gearing with pinion m by means of their cogs a a. Each of these wheels is also provided with a set ofv ordinary cogs or ratchet-teeth, o o, as seen in the drawings. In connection with these parts I arrange a bifuroated lever, L, pivoted upon the spindle T 'at its forked ends Z l, and working vertically.l This lever is provided with shoulder t t,which may come nearly against the face of cach cog-rim fn a, and within a chamber in such 'shoulders is a beveled pawl, i, which, actuated by a spring, i', operates against the cog-rim, and prevents it from rotating except in one direction.

This completes the construction, of the machine. Its operation is as follows: By forcing the lever L downone of the pawls t' Aengages with its wheel N and rotates it, the other sliding over the cogs on its wheel N without rotating it. Upon raising the lever the operai'ion is reversed, the wheel N being forced around, and the Wheel N not being moved by the lever; but if either-of' said Wheels moves around, the shaft ais rotated in one direction or the other, and when they are moved alternately in opposite directions the 'shaft is rotated eontinumisly in the same direction. f The operation of the lever being, as above described, to rotate the wheels N X alternately in opposite; directions, the result is that by its use the shaft a an d the chain and saws are moved in one direction, and that direction is such as V1:0 give eifective'operation to theV saws and the cutting-teeth of the chain.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

e p 92,871 i 1. In a machinefor the purpose indicated, having a pivoted arm, C, carrying two saws at its forward end, the endless Chain E, provided witli the teeth l. c, and operating as and for he purpose described.

2. The arrangement of lever L, psw-'ls ii, wheels N N, each having a cog-rim, O, and bevel-cog ri n1 u, pinion m, shaft a, and spindle T, when used for the pn rpose of rotating an cndl l less chain, "l ina machine constructed and operating as above described.

DAVID Mon-Ris.

Witnesses:

' B. F. Anson,

J .ums Grimm-L 

